Internal-combustion engine.



A. E. OSBORN.

INTERNAL COMBUSTION ENGINE.

APPLICATION FILED MAR 15. I916.

. Patented Dec. 25 1917 J0 0 ii-l 7 7 I z, 4 5 6 T x I I! 619 ai riiwtoz ALDEN E. OSBORN, OF NEW YORK, N. Y.

INTERNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Dec.25,191"7.

Original application filed December 29, 1914, Serial No. 879,589. Divided and this application filed March 15 1916. Serial No. 84,256.

To all whom it may concern:

lie it known that I, ALDEN E. OsBoRN, a citizen of the United States of America, and a resident of New York, county and State of New York, have invented certain new and useful Improvements in Internal- Comhustion Engines, for which I have filed an application for Letters Patent, Serial No. 879,589, on the 29th day of December, 1914, (patented January 16, 1917, No.

1212391) and of which this is a divisionalv mit of a. particularly advantageous arrangement of ports and which shall cooperate with the main piston in opening and closing the ports.

Other objects and advantages of my invention will be set forth hereinafter, and

in order that my invention may be thorthe line 2-2 of Fig. 1 of the cylinder of the engine.

The engine here shown comprises a piston 30, which is surrounded by a sleeve valve 31 and is connected to a crank shaft 32 by a crank 33 and a connecting rod 34. The sleeve valve has a lateral projection 35 at its outer end which is connected to a valve crank shaft 36 by a valve crank 37 anda connecting rod 38. The shafts 32 and 36 are. connected by gears 39.

The cylinder of the engine comprises a main body portion 40, an upper body portion 41, and a pair'of interposed hollow annular members 42 and 43 in which the exhaust port .44 and admission port 45 are respectively located.

The parts of the cylinder are fitted together and certain of them are provided with annular notches so as to provide pockets or grooves 46, 47 and 48 in which packing rings 46*, 47 and 48 are located.

The arrangement of parts is such that the packing ring 47 is interposed between the members 42 and 43 and between the exhaust and inlet passages, the packing ring 46 is between the annular member 42 and the upper body portion 41 of the cylinder, and the packing ring 48 is between the annular member 43 and the main body of the cylinder. 1

As explained in detail hereinafter, the exhaust ports 44 and the annular passage with which it communicates, are uncovered during the exhaust stroke on account of the displacement of the sleeve valve; on the other hand, the admission ports and the passage with which it communicates are opened into the cylinder through a. plurality of radial openings 51 in the valve sleeve, the piston being displaced at the proper time to uncover these openings. The two parts of the cylinder and the interposed members 42 and 43 are held together by bolts or tie rods 50.

The operation of this engine is as follows: Assuming that the parts occupy the positions in which they are shown in the drawings,th'at a compressed charge has just been'fired'and that the valve sleeve is reciprocating at one-half the speed of the piston; the piston 10 is moved outwardly through its working stroke and the sleeve valve will advance in the same time, a distance corresponding to a 90 degree movement of the crank 37. When the piston moves through about one-half of its working stroke, it is below the annular assage which communicates with the admlssion port; but this passage is previously covered because the sleeve valve has advanced a distance corresponding to about a 45 degree movement of the crank 37.

The next stroke of the piston is the exhaust stroke and during thls stroke the piston moves a distance corresponding to another quarter turn of the valve crank. The

arrangement of parts is such that the exhaust port is open at the beginning of the stroke,'the' burnt gases are forced out, and the exhaust port again covered. During the suction stroke of the piston which is next, the valve crank advances another quarter turn and the sleeve valve occupies a position approximately as shown in Fig. 1 but is moving in the opposite direction toward the inner end of its stroke.

The openings 51 in the sleeve valve thus register with the annular passage which communicates with the admission port 45, and fuel will pass into the cylinder, there being, of course, a partial vacuum formed in the combustion chamber during the first part of the suction stroke until the piston has advanced sutliciently to uncover the openings 51. The fuel is supplied in the usual way through the remainder of the stroke.

During the beginning of the compression stroke, the admission port .45 is opened but is soon closed by the sleeve valve whichis moving over its inner center; later in this stroke the iiston covers the openings .31 and consequently the filel is prevented from being forced out into the carbureter, when the sleeve valve moves to such a position that the openings 51 again register with the admission port.

The structure illustrated may be modified in various particulars without departing from the spirit and scope of my invention, and I intend that only such limitations be imposed as are indicated in the appended claims.

lVhat I claim is:

1. An internal combustion engine comprising a cylinder having a pair of independent sections and interposed hollow annular members provided respectively with admission and exhaust ports, a sleeve valve within the cylinder, and a piston within the sleeve valve.

2. An internal combustion englne comprising a cylinder having a pairof independent sections and interposed hollow annular members provided respectively with admission and exhaust ports, a sleeve valve within the cylinder having-a plurality of openings adapted to open communication between the admission port and the cylinder, and a piston within the valve cylinder, said sleeve valve being adapted to uncover the exhaust port at the outer end of its stroke.

3. An internal combustion engine comprising a cylinder having a pair of independent sections and interposed hollow annular members provided respectively with admission and exhaust ports, a sleeve valve within the cylinder having a plurality of openings adapted to open communication between the admission port and the cylinder, and a piston within the valve cylinder. said sleeve valve being adapted to cover the admission port at the inner end of its stroke and thereby prevent loss of compression before the admission port is covered by the piston.

4. An internal combustion engine comprising a cylinder having a pair of inde-' pendent sections and an interposed hollow annular member provided with a port, a sleeve valve within the cylinder, and a piston within the sleeve valve.

In witness whereof, I havehereunto set my hand this 8th day of March, 1916.

ALDEN E. OSBORN. 

